Culvert.



PATENTED AUG. 18, 1908.

D. G. BOYD.

GULVERT. APPLICATION FILED JULY 8,1907.

awdntoz DAVID C. BOYD, OF GALION, OHIO.

GULVERT.

Specification of Letters Patent.

Patented Aug. 18, 1908 Application filed July 8, 1907. Serial No.382,757.

To all whom it may concern:

Be it known that 1, DAVID C. BOYD, citizen of the United States,residing at Galion, in the county of Crawford and State of Ohio, haveinvented certain new and useful Improvements in Culverts, of which thefolloW- ing is a specification.

This invention has for its object a simple, durable and efficientconstruction of metallic culvert, and the invention consists in certainconstructions and arrangements of the parts that I shall hereinafterfully describe and claim.

For a full understanding of the invention and the merits thereof andalso to acquire a knowledge of the details of construction and the meansfor effecting the result, reference is to be had to the followingdescription and accompanying drawings, in which:

Figure 1 is a perspective view of the culvert. Fig. 2 is a detailtransverse section of the same. Fig. 3 is a detail view of amodification.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

My improved metal culverts are construct ed in sections of any desiredlength and diameter and each section comprises a body portion 1 which iscylindrical and which is formed by rolling or shaping a metal sheet uponitself, the two ends or edges being preferably slightly overlapped toform the joint in the completed cylindrical body portion. Each bodyportion 1 is provided at each end with an outstanding collar 2, the bodyportions being placed end to end, as many as may be desired, to form aculvert of the requisite length, the collars 2 being secured together bybolts or rivets 3 extending through abutting collars 2.

An important feature of my improved culvert resides in the provision ofa series of reinforcing ribs 4, which extend longitudinally of each bodyportion, preferably from end to end, and which are of any desired numberarranged on the exterior of the body portion 1 at any desired intervalsor distances apart. Each of these reinforcing ribs 4 is provided withoutwardly projecting attaching flanges 5 secured by rivets 6 or the liketo the sheet metal of which the body portion is formed, and betweenthese attaching flanges 5 the metal strips which form the reinforcingribs 4 are crimped to produce longitudinally extending corrugations 7.The portions of the reinforcing ribs 4' between the attaching flanges 5stand out referably in a true radial direction from the ody portion 1 ofthe culvert and the folds preferably abut against each other or areclose to each other, as shown, so that the entire body portion isstrengthened to a marked degree, while at the same time very light metalmay be used in the construction both of the body portion of the culvertand the reinforcing ribs thereof. Preferably the end collars 2 extendacross the ends of the reinforcing ribs and abut against said ribs,sothat the ends of the ribs will serve to'assist in strengthening thecollars and prevent the same from bending. Preferably, also, onereinforcing rib is located at the joint of the overlapped ends or edgesof the body portion and riveted or otherwise secured on opposite sidesof the joint as indicated in Fig. 2-, so as to assist in maintaining atight joint, it being noted that the inwardly extending middle crimp orbend of this rib bears against the joint.

In the specific construction of the device illustrated in Fig. 1, theend collars 2 of the body portions 1 of the culvert are formed bybending outwardly the walls of the pipe. If

desired, however, as illustrated in Fig. 3,

these attaching collars may be formed of a separate piece, as indicatedat 2, bolted or otherwise secured to the ends of the body portions 1.

From the foregoing description in connection with the accompanyingdrawings, it will be seen that I provide a very light, durable andefficient construction of sheet metal culvert in which the ribs willeffectively reinforce the body portion of the culvert and prevent thesamefrom breaking down under very severe strain, while at the same timeit is to be noted that the interior of the culvert is perfectly smoothand does inno wise impede the flow of water, which is not the case withthose sheet metal culverts in which the strengthening characteristic isproduced by a secured to the exterior of the body portion, aninwardlyextending bend bearing against the ribs being constructed ofsheet metal and the joint. 10 embodying outwardly extending attaching Intestimony whereof I afliX my signature flanges, the ribs being orimpedbetween the in presence of two witnesses.

attaching flanges, whereby to produce out- DAVID C. BOYD. [L. s.]

standing and longitudinally disposed corru- Witnesses: gations in theribs, one of said ribs overlap- CHARLES E.'FOX,

ping the joint in the body portion and having CLARENCE L. MAHEL.

